I got 45.67 in gate 2019 ECE can i apply for iit

As per your marks the predicted gate score will be 581.

As per your score and previous year cutoff, the colleges you get in first round are:-

IIT ISM Dhanbad Electronics Engineering VLSI Design

IIT Mandi School of Computing and Electrical Engineering Communications and Signal Processing

IIT ISM Dhanbad Electronics Engineering Communication and Signal Processing

IIT ISM Dhanbad Electronics Engineering RF & Microwave

IIT ISM Dhanbad Electronics Engineering Optoelectronics and Optical Communication Engineering

IIT Patna Electrical Engineering Communication System Engineering

To know more about your chances of getting other colleges check out the PSU/college predictor link below:

https://engineering.careers360.com/gate-college-predictor