Genuine advice needed

So recently I have just joined a MNC directly from my college as an on campus placement. The salary package is comparatively low as per my peers or friends.

As per my profile, I always keep thinking that i deserve a better pay, but due to my low GPA has to settle for this.

So now as I have joined this company around a month ago, should I be actively looking for other opportunities considering I only have 1 month of full time experience but around 2 good internships ( both 3-4 months) at 2 great brand names in Indian market ? Will it create a bad impression of mine for looking other opportunities just after 1 month of joining? Will there be any problem in salary negotiations too?

Please advice me.