105.5 marks in GUUCET is generally enough for admission to LD College. The admission criteria for LD College Includes:

Minimum 45% marks in Physics, Chemistry and Mathematics subjects in the qualifying examination (GUJCET) 65 marks in GUJCET is sufficient to meet this eligibility criteria

However, please note that admission is based on merit and availability of seats. With 65 marks, you should be able to get admission, but the actual admission offer will depend on the competition and cutoff marks for the current year. It's best to check the college website or speak to the admission office for the most up-to-date information on the current year's admission process and criteria

A candidate shall have passed HSC (10+2) with minimum 45% marks (40% for SC/ST/SEBC/EWS) of theory (or theory and practical) marks of Physics & Mathematics as compulsory subjects with (Chemistry or Biology or Technical Vocational subject) from a single board