Gandhi's strong reaction came as Congress is set to return to power in the state, one-and-half months after President's rule was imposed.
Earlier, the Centre told the Supreme Court that there is no doubt that Harish Rawat has proved majority on the floor of the Assembly, following which the court said he will assume office as Chief Minister after President's rule is revoked.
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"They (BJP) did their worst. We did our best. Democracy won in Uttarakhand!," Gandhi tweeted.
He said people and institutions built by the founding fathers of the country will not tolerate "murder of democracy".
"Hope Modiji learns his lesson-people of this country and the institutions built by our founding fathers will not tolerate the murder of democracy!," he said.
The Supreme Court allowed the Centre to revoke President's rule.
It said Rawat got 33 votes out of 61 in the floor test yesterday.