Bitcoin Core Vs Daemon (Windows 10) I assume that if I've Bitcoin installed locally and I either run the GUI or the Daemon... It's the same wallet, data?
To that end, if I want to use the RPC interface, can i just use the GUI while developing (I like that at alerts on any action) rather than the daemon?
TL:DR: is the RPC 8332 port active when using the GUI, Vs the Daemon?
It's the same wallet, data?

This depends on your configuration like -datadir. This can be specified by command line, or something like a registry key value (when you are using Microsoft Windows).
Note that recent versions of Bitcoin Core supports loading multiple wallet at same time.

TL:DR: is the RPC 8332 port active when using the GUI, Vs the Daemon?

Yes, of course both bitcoin-qt and bitcoind supports JSON-RPC.
Edit: My apologies. For bitcoin-qt GUI, to enable JSON-RPC you must specify -server=1 in command line options, or edit bitcoin.conf to add server=1 to it. For command-line bitcoind, JSON-RPC is enabled by default. Thanks for Pieter Wuille for pointing this out.