"Voter turnout of 54 to 55 per cent was recorded till 3 PM," state Election Commission officials said.
Around 1.98 crore voters will decide the fate of 820 candidates, contesting in the second phase of the election.
Veteran BJP leader L K Advani exercised his franchise at a polling booth in Shahpur area here. Earlier in the day, Leader of Opposition in Rajya Sabha Arun Jaitley and Chief Minister Narendra Modi cast their vote.
Modi, who is contesting from Maninagar Assembly constituency, is locked in a direct contest with Congress candidate Shweta Bhatt, wife of suspended IPS officer Sanjiv Bhatt.
A new entrant, Shweta is testing political waters for the first time.
The constituencies where polling started include 17 in Ahmedabad city, 40 constituencies in five districts-Vadodara, Dahod, Panchmahal, Kheda and Anand-of central Gujarat, 32 seats in five districts -Patan, Mehsana, Sabarkantha, Gandhinagar and Banaskantha-of north Gujarat, and six seats in Kutch district.