There were serious effects of Gibraltar, I'll present them shortly....
Op Gibralter, well its effects...
Bulk of the Indian Army was engaged around Jura and Bedori Bulges which had already been reduced. Indian attention was fixed on these sectors thats why their commanders completely failed to detect the buildup for Grandslam (despite being warned by UN observers at the last moment). Thats why Indians were unable to disconnect themselves from the north, this allowed Grandslam the success it had.
On 1 Aug 65, there was a meeting at Srinagar in which COAS IA, GOC WC, GOC 15 Corps were there.
There main three points were...
IA over extended on CFL
Low standard of police bns in Kashmir
Ineffective Home Guard Organization.
The first news of Gibralter infiltration was received by IA on 5 Aug 65, once Salahuddin force was discovered at Dara Kasi and Nusrat was detected in Mendhar.
68 Brigade, the reserve of 15 Corps was moved to Tanmarg, no ther troops were readily available, less 4 J&K Militia units.
Can be judged from the fact that 4 Sikh LI was in Ambala, was alerted and then hastily air lifted to Srinagar.
Therefore, IA took some time to be effective.
On 8 Aug, Indian Def Secretary recommended Martial Law in state, however, Comd 15 Corps told him that he was confident of handling the situation.
Maj achievement of Gibralter forces include...
E/Nusrat mounted a daring attack against 4 Kumaon, in which 4 Kumaon lost its CO as well.
Salahuddin force managed to infiltrate till suburbs of Srinagar.
Gaznavi force, the most successful of Gibralter forces..almost got Ramban bridge....gained complete control of Budil area till it was ORDERED to exfil on 27 Sep.
G/Nusrat, the most successful of Nusrat forces, ambushed lead unit of 52 Mountain Brigade (3 Rajputana), killing 71 soldiers....captured Mandi
Meanwhile, Indians had increased artillery fire across CFL....GOC 12 Division asked for 4 Corps Artillery...this w to be first of its many successful actions....
On 15 Aug, 4 Corps Artillery opened up a well planned, surprise artillery fire plan which hit Indian 191 Brigade O Group, wounding many and killing the brigade commander, Brig B F Masters...Brigade ammo dump was also destroyed, IA abandoned Palanwala post due to artillery fire....lot may other losses due to artillery fire.
It is also pertinent to mention that till the end, Indians failed to open the Uri Poonch road which was one of their main aims in Bedori....
Overall
Losses in Jura and Bedori were negligible when compared with gains in Munawar gap by Grandslam..These losses were expected due to bad troops to space ratio in 12 Division...
however, these losses were still within the limited laid down by Pak GHQ.
In the end, IA committed more forces against Jura and Bedori, while having nothing to counter any Pak thrust towards Akhnur...Two IA brigades had already been pulled out of Jammu...so IA was playing almost as per the needs of Gen Akhtar Malik, GOC 12 Division...
In fact, the full value of Gibralter was have been encashed only after capture of Akhnur, once 12 and 7 Division would have veered towards Naushara and Jammu....if this would have happened, there would have been no Operation Nepal by Indian 1 Corps.