GK is already preset...the default goalkeeper training is fine anyway.
Its shit.
Here is my training schedule, its very good and I have logic to prove it

Right, heres some explanations :
Strength and
Aerobics are reduced because the only important attributes they affect are Pace, Acceleration and Strength.
Goalkeeping has been increased because it affects important attributes; Aerial Ability, Handling, Kicking, Throwing, One on Ones
Tactics has been increased because it affects important attributes; Anticipation, Decisions, Positioning,Teamwork, Command of Area
Ball Control has been increased to improve the keeper's First touch.
Defending has been increased to improve Concentration.
Attacking has been increased to improve Passing.
Although you will not see the benefits of ball control, attacking and defending (because they do not come up on the keepers attributes page), they are being improved and you may even see your keeper's outfield rating improve.
The workload is on heavy because goalkeepers are unlikely to get tired during the season. Obviously, if your keeper keeps on getting injuries, reduce the workload.