Is it a good idea to leave galgotias after 1 year and go for iet Lucknow?

Be more specific about your rank as it would help define the scenario better. But, in any case, you should know the various advantages of IET Lucknow over Galgotias. Some of them are as follows:

1. The peer group at IET Lucknow is extremely better and they choose to be focused on every cause whatsoever.
2. It is a government-run institute, which gives it an upper hand.
3. There is the provision of a scholarship for complete waiver on the tuition fees for several backward students in the class. You might also secure your B.Tech degree completely free. Besides, it comes with amazing ROI.
4. The faculty in every department is better than most other institutes around. Both permanent and visiting, in Mechanical engineering, Civil Engineering, and the CSE department are one of a kind.
5. You will also have access to several coaching centers within a 2 KM radius, which is highly beneficial. Thus, you can prepare with liberty for as many exams as you want to take, like CAT, GATE, UPSC, GRE, and others.
6. The placement drive has always been good. The visiting companies are Amazon, Adobe, TCS, Wipro, Sigma, LAVA international, Honda Cars, Analytics Quotient, Snapdeal, BSNL, Merchant Navy, Sterlite, Tata Chemicals, and more.

Other than the advantages, here are some of its demerits,

1. The infrastructure of IET Lucknow is somewhat poor, as is found in many other government institutes.
2. The administration can sometimes be extremely indifferent towards the requirements students usually have.
3. The quality of pedagogy is rapidly deteriorating in most classes.

You can enroll at IET Lucknow only if you wish to pursue Mechanical Engineering, CSE, or Civil Engineering. In contrast, if you want to ace other important competitive exams, then you can research more about other institutes as well.