Soul Release is the most direct way to remove cards from your opponent’s Graveyard, before you Special Summon Gilasaurus. This will ensure they are unable to Special Summon any monsters due to Gilasaurus’ effect.
Jurassic World is a Field Spell that increases the ATK and DEF of all Dinosaur-type monsters by 300. Fossil Dig is able to search for any Dinosaur monster which is Level 6 or lower, from your Deck. Fossil Excavation can Special Summon any Dinosaur monster from your Graveyard, but its effects are negated.
This card would go well with cyber dinosaur. Special summoning gilasaurus would give your opponent the choice to special summon from their GY. If your opponent special summons a card (outside the battle faze) you an special summon cyber dinosaur with an attk of 2500 giving you two monsters and your normal summon still...
I think this card could be useful in help summoning guardian grarl. If you get 3 gilasurus, 3 gaurdian axes, and 3 gaurdian grarls in your deck then special summoning gaurdian grarl should be easy. You could special summon 2 of these place an axe on one and assuming you have only 4 cards in your hand special summon gaurdian grarl with its special effect. And 1700 attack with dinosaur kingdom is pretty good.