I have a reproduction of a
Gladius Hispaniensis, "Spanish Sword," of the period of the late Republic, say about 150 CE to about 75 CE, and its blade is 25+", not at all uncommon for these swords at that time. Indeed, an article by Peter Connolly in the
Journal of Roman Military Equipment Studies No. 8 seems to show most of the Spanish Swords having blades between 25" and 29" in length.
As to drawing the sword, I was watching Quintus(Matthew Amt) of Legio XX at their Roman Days festival last June as he demonstrated what he has determined to be the easiest and best way to accomplish this. If you will note, the suspension rings on gladius scabbards are all mounted fairly well down from the mouth of the scabbard, allowing it to pivot foward. What he does is to reverse his right hand and then to slam it forward, palm first and thumb down, into the hilt of the sword, forcing the scabbard and sword to tilt forward. He then continues the forward momentum in one sweep, grasping the hilt of the sword as he does so. This sweeps the sword out of its scabbard and he then allows its forward momentum to pivot the blade forward and up so that it is in the "Ready" position for use. It is all very quick and efficient, but I would suggest practicing with a dull blade, just as you practice kinetic openings of a Gunting with a dull blade, and for the same reasons. BTW, I also watched other re-enactors at the festival using the same method to draw
spathae, the rather longer Roman slashing swords for cavalry use, which were also carried on the right side up into the 3rd Century CE. You can also see it done by Stephen Boyd in the film
The Fall of the Roman Empire, a sword and sandal epic of grand proportions that also starred Sophia Loren

.