Hello, Frantisek -
I hope I am correct in thinking you are seeking an owner's manual for a citizen's band radio.
I have been looking online and have not yet found a manual for the model number you need.
Through Internet Archive I did find a manual covering a variety of citizen's band radios, but your General Electric model was not listed. The manual was published in 1976. This is the link, in case you are interested:
https://archive.org/details/Sams_Citizen_Band_Radio_Manual_Volume_1_
I have also tried to find online forums where citizen band enthusiasts might post so that you could join a forum or two and ask if anyone else in the forum has the manual in print form and would be willing to scan it as a PDF for you.
This is a link to a Facebook page for CB radio fans:
https://www.facebook.com/CBRadioAction/
If you belong to Facebook you can sign in and post on that page asking if someone has the manual for the mode you need and if that person would scan it for you.
This forum has an Australia focus:
https://www.aussiescanners.com.au/forum/viewforum.php?f=213
You will need to register (free) to post a question.