GDB RSP protocol question

[NarenB]

I am a WinDbg user trying to become familiar with GDB and RSP protocol that GDB uses.

Can we assume that the GDB client and server communication is always a synchronous ? That is the GDB server sends a response to the client's request and there is no unsolicited packets from the GDB server ?

If the GDB client issues a continue command, is the only response to that is when the breakpoint (that was set earlier on) is hit ?

Thanks !!