Engineering in Gujarat

Well, Engineering is full time study course. You cannot do it through part time, because engineering is practical and theoretical both. So, it is necessary to be regular for that course on full time. You can do it as part time. And, as you have completed Diploma, you will get admission in 2nd year of B.Tech-full time degree directly. Thanks.

Greetings, please confirm the course you want to enroll in for better understanding. Please find the link below where you can check the admission process for various courses:
https://www.shiksha.com/college/new-horizon-college-marathahalli-Bangalore-4453/admission
All the Best.

Admission to engineering colleges in Gujarat is done via entrance examination, so if you have not appeared for any entrance test, it will be difficult to secure a seat in any engineering college in the state. Entrance examinations accepted for admission to engineering colleges in Gujarat are mentioned below:
1) GUJ-CET
2) JEE Mains.

I have less idea about the government colleges, but as per me, Nirma University and PDPU are good for chemical engineering.

Your marks and percentage, both are very low and there is very less chances of getting any government college in Gujarat. But, you can get private colleges on the basis of this number. When you will go for online counselling, you should add private colleges, because there is no chances of getting any government college.

No, there is no difference between engineering from Gujarat and Maharashtra. Only the language barrier is there. While pursuing a degree in Maharashtra, teachers explain in Marathi and in Gujarat, teachers explain in the Gujarati language.

Go through the link below for details:
https://www.shiksha.com/b-tech/ranking/top-civil-engineering-colleges-in-Maharashtra/53-2-114-0-0
For colleges in Gujarat, filter the state in the above link.