Hey man, stop passing this information as it is actually false. As long as you have implied status, you can apply for a PGWP no problem, although you won't be eligible to work while you wait for the PGWP.
Again, you DONT need to pay for restoration of status since you didn't lose any status.
Source: Someone who applied (and got) and has seen people apply for PGWP on study permit extension implied status.
For more information pls read implied status on canada .ca in which they explained everything about the applications made on implied status .