Almost certainly . . . if you could unambiguously specify the job to be done. What you say verbatim doesn't match your sample data, and there's usually noy carriage return in *nix text files.
Would this paraphrase of your request express your needs:
"in a file of empty line separated records, comment out one record's lines AFTER the record identified by [G-MI01SSR] patter"?
This looks like a config file (or ini file) that can be read by python's configparser module. Here's an attempt to comment out a section using python 3 interpreter.
import configparser
file = 'config.txt'
config = configparser.ConfigParser()
config.read(file)
section = 'P-VE01SSR'
for (k, v) in config[section].items():
config.remove_option(section, k)
config.set(section, '#' + k, v)
with open(file, 'w') as configfile:
config.write(configfile)