GPO printer deployment for not included drivers

I have deployed printer using GPO, however in the event viewer on the
client I tested it says that printer cannot be installed because there
is no drivers. Fact is the drivers are not standarf drivers that are
included in Windows installation. At the same time I have shared this
printer using Printer Manager and if I manually go to **** printer
share, it asks me to download drivers. After confirmation it works
perfectly.... But it requires manual confirmation. I do not want to
have any manual intervention I expect GPO to download driver for that
printer and install it silently.

Any ideas?

Sounds to me that you may have a 32/64 bit driver issue. Your shared
printer may be on a 64 bit machine, but maybe your workstations are 32 bit.
The whole idea of "sharing" the printer is a location to get the drivers
from. Maybe remove one of the workstations from the GPO, manually add the
printer, download the proper drivers, then re-share it. Use that share for
your GPO to pull drivers from.

Could also be an unsigned driver issue, but not likely based on your
description