diff --git a/packages/nc-gui/composables/useViewGroupBy.ts b/packages/nc-gui/composables/useViewGroupBy.ts
index caa4d6642f..1c6ea8fddb 100644
--- a/packages/nc-gui/composables/useViewGroupBy.ts
+++ b/packages/nc-gui/composables/useViewGroupBy.ts
@@ -150,13 +150,13 @@ export const useViewGroupBy = (view: Ref<ViewType | undefined>, where?: Computed
   const calculateNestedWhere = (nestedIn: GroupNestedIn[], existing = '') => {
     return nestedIn.reduce((acc, curr) => {
       if (curr.key === GROUP_BY_VARS.NULL) {
-        acc += `${acc.length ? '~and' : ''}(${curr.title},blank)`
+        acc += `${acc.length ? '~and' : ''}(${curr.title},gb_null)`
       } else if (curr.column_uidt === UITypes.Checkbox) {
         acc += `${acc.length ? '~and' : ''}(${curr.title},${curr.key === GROUP_BY_VARS.TRUE ? 'checked' : 'notchecked'})`
       } else if ([UITypes.Date, UITypes.DateTime].includes(curr.column_uidt as UITypes)) {
         acc += `${acc.length ? '~and' : ''}(${curr.title},eq,exactDate,${curr.key})`
       } else {
-        acc += `${acc.length ? '~and' : ''}(${curr.title},gb_val,${curr.key})`
+        acc += `${acc.length ? '~and' : ''}(${curr.title},gb_eq,${curr.key})`
       }
       return acc
     }, existing)
diff --git a/packages/nocodb/src/db/BaseModelSqlv2.ts b/packages/nocodb/src/db/BaseModelSqlv2.ts
index 780056ced5..35571e1cfa 100644
--- a/packages/nocodb/src/db/BaseModelSqlv2.ts
+++ b/packages/nocodb/src/db/BaseModelSqlv2.ts
@@ -59,6 +59,7 @@ import { HANDLE_WEBHOOK } from '~/services/hook-handler.service';
 import {
   COMPARISON_OPS,
   COMPARISON_SUB_OPS,
+  GROUPBY_COMPARISON_OPS,
   IS_WITHIN_COMPARISON_SUB_OPS,
 } from '~/utils/globals';
 import { extractProps } from '~/helpers/extractProps';
@@ -5284,7 +5285,7 @@ export function extractFilterFromXwhere(
 
 // mark `op` and `sub_op` any for being assignable to parameter of type
 function validateFilterComparison(uidt: UITypes, op: any, sub_op?: any) {
-  if (!COMPARISON_OPS.includes(op)) {
+  if (!COMPARISON_OPS.includes(op) && !GROUPBY_COMPARISON_OPS.includes(op)) {
     NcError.badRequest(`${op} is not supported.`);
   }
 
diff --git a/packages/nocodb/src/db/conditionV2.ts b/packages/nocodb/src/db/conditionV2.ts
index e2cda40f82..2f236429d8 100644
--- a/packages/nocodb/src/db/conditionV2.ts
+++ b/packages/nocodb/src/db/conditionV2.ts
@@ -116,9 +116,13 @@ const parseConditionV2 = async (
     };
   } else {
     // handle group by filter separately,
-    // `gb_val` is equivalent to `eq` but for lookup it compares on aggregated value returns in group by api
+    // `gb_eq` is equivalent to `eq` but for lookup it compares on aggregated value returns in group by api
     // aggregated value will be either json array or `___` separated string
-    if (filter.comparison_op === 'gb_val') {
+    // `gb_null` is equivalent to `blank` but for lookup it compares on aggregated value is null
+    if (
+      filter.comparison_op === 'gb_eq' ||
+      filter.comparison_op === 'gb_null'
+    ) {
       const column = await filter.getColumn();
       if (
         column.uidt === UITypes.Lookup ||
@@ -133,10 +137,13 @@ const parseConditionV2 = async (
           getAlias: getAliasGenerator('__gb_filter_lk'),
         });
         return (qb) => {
-          qb.where(knex.raw('?', [filter.value]), lkQb.builder);
+          if (filter.comparison_op === 'gb_eq')
+            qb.where(knex.raw('?', [filter.value]), lkQb.builder);
+          else qb.whereNull(knex.raw(lkQb.builder).wrap('(', ')'));
         };
       } else {
-        filter.comparison_op = 'eq';
+        filter.comparison_op =
+          filter.comparison_op === 'gb_eq' ? 'eq' : 'blank';
         // if qrCode or Barcode replace it with value column
         if ([UITypes.QrCode, UITypes.Barcode].includes(column.uidt))
           filter.fk_column_id = await column
diff --git a/packages/nocodb/src/db/generateLookupSelectQuery.ts b/packages/nocodb/src/db/generateLookupSelectQuery.ts
index aa7fba5679..09187d1fdc 100644
--- a/packages/nocodb/src/db/generateLookupSelectQuery.ts
+++ b/packages/nocodb/src/db/generateLookupSelectQuery.ts
@@ -32,7 +32,7 @@ export default async function generateLookupSelectQuery({
   column,
   baseModelSqlv2,
   alias,
-  model,
+  model: _model,
   getAlias = getAliasGenerator('__lk_slt_'),
 }: {
   column: Column;
diff --git a/packages/nocodb/src/utils/globals.ts b/packages/nocodb/src/utils/globals.ts
index 2602637916..f3bce47faf 100644
--- a/packages/nocodb/src/utils/globals.ts
+++ b/packages/nocodb/src/utils/globals.ts
@@ -171,7 +171,12 @@ export enum CacheDelDirection {
   CHILD_TO_PARENT = 'CHILD_TO_PARENT',
 }
 
-export const COMPARISON_OPS = <const>[
+export const GROUPBY_COMPARISON_OPS = <const>[
+  // these are used for groupby
+  'gb_eq',
+  'gb_null',
+];
+export const COMPARISON_OPS = (<const>[
   'eq',
   'neq',
   'not',
@@ -201,9 +206,7 @@ export const COMPARISON_OPS = <const>[
   'isWithin',
   'btw',
   'nbtw',
-
-  'gb_val'
-] as any;
+]) as any;
 
 export const IS_WITHIN_COMPARISON_SUB_OPS = <const>[
   'pastWeek',