Gaj is another way of saying Square Yard , it is used in northern part of India, to answer your question, 100Sq metres = 119.56 ~ 120Sq yard or 120gaj.
One gaj is the same measurement as one square yard. Therefore, rounded to two decimal places, 100 square metres is equal to 100 / (0.9144^2) = 119.60 gaj.
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