By 9 a.m. London time on Wednesday, over 131,000 people had voted with 79.2% of voters choosing the "Hell yeah" option, and the remainder voting for "nope."
Gigafactory is the name Musk has given to Tesla's production plants. Currently there are two in the U.S. and one in Shanghai, China. Musk announced last year that Tesla's first European factory would be built around Berlin, Germany.
On the company's fourth-quarter earnings call last week, Musk explained the need to ramp up battery production to meet the demand for Tesla's cars.
"We got to scale battery production to crazy levels that people cannot even fathom today. That's the real problem," he said.
That's where these additional factories can help. Musk did not give any further details on his Twitter feed.
Tesla's shares have seen a meteoric rise recently. In the past five days, shares of the electric carmaker are up over 38% and have more than doubled since the start of the year.