G'day Mate and welcome to TBN from Downunder.
As mapper said, all of the information will be in your Owners Manual. Mostly it's an oil filter & oil change, grease all the nipples and check fluid levels. I'd also suggest going around the tractor with a torque wrench and ensuring that 'things' are tightened to specifications (they're also in your Owners Manual). Pay particular attention to the wheel lug-nuts. Depending on manufacturer's recommendations, you won't have to change the hydraulic fluid & filter until the 400hr mark.
Enjoy the site.
WagTail, humbly stated - I think you had a typo - as the 50 hour service is to change the hydro fluid and filter also as well as the front axle fluid and gear box fluid on any mmm etc.. That's in addition to engine oil and oil filter - and I also did the fuel filter at that time.
I purchased the factory service manual for my GC1710. About $100. Ho hum. I was underwhelmed. From memory, I think about half of it simply duplicated the owner manual.
I could never find in my owner manual a diagram showing every possible grease location. I checked the factory service manual and found only the same limited information from the owner manual. My experience with buying service manuals for automobiles is that you get a very good, detailed reference manual. Not so much with this one.
btw, the GC1710 is great. No complaints.