To answer the question, I followed these steps:

<ul>
  <li><b>Identified the relevant indicator</b> by searching for data on gross primary school enrollment rates, focusing on the correct education level and type of enrollment ratio.</li>
  <li><b>Confirmed the country code</b> for Honduras to ensure the data retrieved would be accurate and specific to the country in question.</li>
  <li><b>Located the correct indicator name</b> for gross primary school enrollment, making sure to distinguish it from similar indicators like net enrollment or other education levels.</li>
  <li><b>Retrieved the enrollment rates</b> for Honduras for the years 2007 and 2021, using the appropriate indicator and country code.</li>
  <li><b>Calculated the change</b> by subtracting the 2007 value from the 2021 value to determine the difference in gross primary school enrollment rates over the period.</li>
</ul>

In summary, I systematically found the right indicator, gathered the necessary data for both years, and performed a simple calculation to find the change.

<b>Final answer:</b> The gross primary school enrollment rate in Honduras increased by 10.2 percentage points between 2007 and 2021.