Still didn't locate solid docs on this, but I did work it out.
1. Base64 encode the localmanager username:password
2. POST https://<GOSIP>:<GOSPORT>/iox/api/v2/hosting/tokenservice using encoded auth as a bearer token header, to retrive a token.
3. Use retrieved token to create a new header = 'X-Token-Id'
Using new header:
4. GET https://<GOSIP>:<GOSPORT>/iox/api/v2/hosting/platform/sysinfo
BAM! I'm happy Now to see what else I can do with it!